Augmented reality (AR) relies on computer vision, depth tracking, and motion sensing technologies for user interaction. These technologies enable AR systems to overlay digital content onto the physical world, creating immersive experiences. For example, AR applications use smartphone cameras to detect physical environments and place 3D models or information in real-time. The interactivity of AR is enhanced through user inputs, such as touch or voice commands, allowing users to engage dynamically with the augmented environment.